Mercurial > hg > nginx-quic
annotate src/os/win32/ngx_udp_wsarecv.c @ 8797:1e2f4e9c8195 quic
QUIC: reworked migration handling.
The quic connection now holds active, backup and probe paths instead
of sockets. The number of migration paths is now limited and cannot
be inflated by a bad client or an attacker.
The client id is now associated with path rather than socket. This allows
to simplify processing of output and connection ids handling.
New migration abandons any previously started migrations. This allows to
free consumed client ids and request new for use in future migrations and
make progress in case when connection id limit is hit during migration.
A path now can be revalidated without losing its state.
The patch also fixes various issues with NAT rebinding case handling:
- paths are now validated (previously, there was no validation
and paths were left in limited state)
- attempt to reuse id on different path is now again verified
(this was broken in 40445fc7c403)
- former path is now validated in case of apparent migration
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Wed, 19 Jan 2022 22:39:24 +0300 |
parents | d620f497c50f |
children |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
103
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 |
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12 |
1680 | 13 ssize_t |
1689 | 14 ngx_udp_wsarecv(ngx_connection_t *c, u_char *buf, size_t size) |
103
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15 { |
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16 int rc; |
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17 u_long bytes, flags; |
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18 WSABUF wsabuf[1]; |
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19 ngx_err_t err; |
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20 ngx_event_t *rev; |
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21 |
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22 wsabuf[0].buf = (char *) buf; |
184
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23 wsabuf[0].len = size; |
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24 flags = 0; |
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25 bytes = 0; |
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26 |
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27 rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, NULL, NULL); |
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28 |
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29 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 30 "WSARecv: fd:%d rc:%d %ul of %z", c->fd, rc, bytes, size); |
184
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31 |
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32 rev = c->read; |
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33 |
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34 if (rc == -1) { |
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35 rev->ready = 0; |
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36 err = ngx_socket_errno; |
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37 |
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38 if (err == WSAEWOULDBLOCK) { |
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39 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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40 "WSARecv() not ready"); |
184
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41 return NGX_AGAIN; |
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42 } |
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43 |
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44 rev->error = 1; |
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45 ngx_connection_error(c, err, "WSARecv() failed"); |
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46 |
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47 return NGX_ERROR; |
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48 } |
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49 |
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50 return bytes; |
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51 } |
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52 |
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53 |
1680 | 54 ssize_t |
1689 | 55 ngx_udp_overlapped_wsarecv(ngx_connection_t *c, u_char *buf, size_t size) |
184
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56 { |
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57 int rc; |
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58 u_long bytes, flags; |
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59 WSABUF wsabuf[1]; |
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60 ngx_err_t err; |
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61 ngx_event_t *rev; |
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62 LPWSAOVERLAPPED ovlp; |
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63 |
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64 rev = c->read; |
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65 |
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66 if (!rev->ready) { |
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67 ngx_log_error(NGX_LOG_ALERT, c->log, 0, "second wsa post"); |
184
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68 return NGX_AGAIN; |
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69 } |
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70 |
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71 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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72 "rev->complete: %d", rev->complete); |
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73 |
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74 if (rev->complete) { |
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75 rev->complete = 0; |
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76 |
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77 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
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78 if (rev->ovlp.error) { |
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79 ngx_connection_error(c, rev->ovlp.error, "WSARecv() failed"); |
184
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80 return NGX_ERROR; |
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81 } |
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82 |
461 | 83 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
84 "WSARecv ovlp: fd:%d %ul of %z", | |
85 c->fd, rev->available, size); | |
86 | |
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87 return rev->available; |
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88 } |
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89 |
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90 if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &rev->ovlp, |
2776 | 91 &bytes, 0, NULL) |
92 == 0) | |
93 { | |
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94 ngx_connection_error(c, ngx_socket_errno, |
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95 "WSARecv() or WSAGetOverlappedResult() failed"); |
184
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96 return NGX_ERROR; |
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97 } |
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98 |
461 | 99 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
100 "WSARecv: fd:%d %ul of %z", c->fd, bytes, size); | |
101 | |
184
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102 return bytes; |
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103 } |
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104 |
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105 ovlp = (LPWSAOVERLAPPED) &rev->ovlp; |
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106 ngx_memzero(ovlp, sizeof(WSAOVERLAPPED)); |
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107 wsabuf[0].buf = (char *) buf; |
184
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108 wsabuf[0].len = size; |
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109 flags = 0; |
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110 bytes = 0; |
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111 |
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112 rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, ovlp, NULL); |
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parents:
144
diff
changeset
|
113 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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114 rev->complete = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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115 |
278
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
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116 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, |
461 | 117 "WSARecv ovlp: fd:%d rc:%d %ul of %z", |
118 c->fd, rc, bytes, size); | |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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119 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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120 if (rc == -1) { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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121 err = ngx_socket_errno; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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122 if (err == WSA_IO_PENDING) { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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123 rev->active = 1; |
461 | 124 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
125 "WSARecv() posted"); | |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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126 return NGX_AGAIN; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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127 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
128 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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129 rev->error = 1; |
278
0ba4821f4460
nginx-0.0.2-2004-03-04-10:04:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
184
diff
changeset
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130 ngx_connection_error(c, err, "WSARecv() failed"); |
184
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
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131 return NGX_ERROR; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
132 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
133 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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134 if (ngx_event_flags & NGX_USE_IOCP_EVENT) { |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
135 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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136 /* |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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137 * if a socket was bound with I/O completion port |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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138 * then GetQueuedCompletionStatus() would anyway return its status |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
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139 * despite that WSARecv() was already complete |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
140 */ |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
141 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
142 rev->active = 1; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
143 return NGX_AGAIN; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
144 } |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
145 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
146 rev->active = 0; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
147 |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
148 return bytes; |
1bf718ce0dde
nginx-0.0.1-2003-11-14-10:20:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
diff
changeset
|
149 } |